Novel amine compounds

ABSTRACT

Novel amine compounds of the formula WHEREIN R, R1, Y and Y1 are individually alkyl of 1 to 5 carbon atoms and X is a halogen and the dotted lines represent 2 conjugated double bonds which are useful intermediates in organic synthesis and particularly for the preparation of 1,2,4triazoles.

United States Patent [191 Viehe et al. A

[451 Dec. 17, 1974 NOVEL AMINE COMPOUNDS [75] Inventors: Heinz Gunter Viehe; Zdenek Janousek, both of Belgium [7 5] Assignee; Roussel U CLAF, Paris, France [22] Filed: Aug. 3, 1973 [21] Appl. No.: 385,452

[30] Foreign Application Priority Data OTHER PUBLICATIONS Viehe et al., Angewandte Chemie International 7 Edit, v01 10, pp.573-576, 1971).

Primary ExaminerLeon Zitver Assistant Examiner-Gerald A. Schwartz em senbtqrfirm: Hammond. it

[57 ABSTRACT Novel amine compounds of the formula wherein R, R Y and Y are individually alkyl of l to 5 carbon atoms and X is a halogen and the dotted lines represent 2 conjugated double bonds which are useful intermediates in organic synthesis and particularly for the preparation of 1,2,4-triazoles.

7 Claims, No Drawings 3,855,293 1 2 I NOVEL AMINE COMPOUNDS wherein Y and Y, have the above definitions to obtain the corresponding compound of formula l. OBJECTSYOF THE INVENTION The said reaction is preferably effected in an organic i an bj f h invention to id th v l solvent inert to the reactants such as methylene chloamine compounds of f r l 5 ride or chloroform using essentiallyequimolar amounts h i another object f e invention to provide a of the reactants. The reactlon temperature may be varnovelprocessfor the preparation of the compounds of led from about 500cm 150C Preferably I0 f l I. and most preferably at room'temperature. The product It is a further object of the invention to provide a of formula l may be recovered y w methods Such novel process for the preparation of l,2.4-triazoles. as evaporanon of the S e Preclpltallon y addi- These and other objects and advantages of the invention of ethyl r f to mftlke the Product in59lubletion will become obvious from the following detailed The Phosgenemmmum fmmul? H can be description prepared by the processdescrlbed by Sennlng [Chem.

. Rev., Vol. 65 (1965), p. 388] and by Viehe et al [Anth f 3 cmpunds have e gewandte Chemie., Vol. 10 (1971), p. 573-574 The dialkylcyanamides of formula [I] may be prepared by the process described by Kulm [Ber., Vol. 93 (1 960), p. 618].

B C9 9 The novel process of the invention for the prepara- R X I tion of 1,2,4-triaz0les of the formula l 3 1 v wherein R, R Y and Y, are individually alkyl of l to 5 carbon atoms and X is a halogen and the dotted lines 1 C IV represent 2 conjugated double bonds. X may be a halo- 1 l I gen such as fluorine, chlorine, bromine or iodine but 1 chlorine is preferred. I

R, R Y Y i may be alkyl such as methyl, ethyl, propyl, isopropyl, butyl, pentyl, isobutyl, tert.-butyl, etc. 7 but all are preferably methyl. I The compounds of formula l may exist in the followwherein R, ii Y and i have the above definition and i two R is selected from the group consisting of hydrogen and phenyl comprises reacting a compound of formula l l with a hydrazine of the formula R' -NHNH where j R has the above definition to obtain the corresponding 1,2,4-triazole of formula IV.

or Preferably, the reaction is effected by progressively 1 Y 1 4O adding equimolar amounts of the hydrazine to a solution of the compound of formula 1 in an organic solvent such as methylene chloride. A 5 to 30% excess of the hydrazine may be used if desired and the reaction is preferably effected in the presence of a tertiary amine Y such as triethylamine. The triazole may be recovered 9 by treating the reaction mixture with an aqueous solu- \/N\ X tion of an alkaline base such as an alkali metal hydrox- Y ide such as sodium hydroxide and then recovering the 1 f product of formula IV by known methods such as distilx 5 lation.

, 4 The l,2,4-triazoles of formula IV are biologically ac- The novel process of the invention for the preparative compounds and are useful intermediates for the tion of compounds of formula 1 comprises reacting a synthesis of biologically active compounds. They are phosgene immonium s lt of th f l useful in agriculture against undesired vegetation. For

... .n I example, Democratic Republic of Germany Patent N0.

wherein R, R, and X have the above definitions with a dialkylcyanamide of the formula G) useful herbicidal agents. X II In the following examples there are described several preferred embodiments to illustrate the invention. However, it should be understood that the invention is not intended to be limited to the specific embodiments.

EXAMPLE 1 1.29 g of dimethylcyanamide were added with stir- NEJ- III ring to a suspension of 3 g of dichloromethylene di- 1 methyl ammonium chloride (R and R,=CH,, and X Cl) in 15 ml of methylene chloride and after stirring for X 59,288 describes some of these compounds as being 3 30 minutes, the greater portion of the solvent was distilled from the reaction mixture. Then, about 20 ml of ethyl ether were added to the reaction mixture which was filtered to obtain 3.92 g of a compound of formula 1 wherein R, R Y and Y were methyl and X was chlorine melting at l57l6lC (with decomposition). U.V. Spectrum (methylene chloride): A Max. at 282 nm EXAMPLE 2 3,5-bis-(dimethylaminol -phenyl-l ,2,4-triazole 1.08 g of phenyl hydrazine and 3.4 g of triethylamine were added over about 2 hours with stirring to a solution of 1.97 g of the amine compound of Example l in 40 ml of methylene chloride and the mixture was then refluxed for 1 hour. The resulting solution was cooled to lC and ml of concentrated aqueous potassium hydroxide solution were added thereto. The organic phase was separated, dried over potassium carbonate and distilled to dryness to obtain 1.83 g of 3,5-bis- (dimethylamino)-l-phenyl-l,2,4-triazole boiling at 122C under 0.3 mm Hg. Crystallization from water gave the product melting at 7577C.

Various modifications of the products and processes of the invention may be made without departing from the spirit or scope thereof and it is to be understood that the invention is to be limited only as defined in the appended claims.

We claim:

1. A compound of the formula 5. A compound of claim 4 wherein Y and Y are methyl.

of claim 1 wherein R and R are 6 A process for the preparation of a compound of claim 1 comprising reacting a phosgene immonium salt of the formula wherein R. R and X have the definition of claim 1 with a dialkylcyanamide of the formula wherein Y and Y have the definition of claim 1 to form the corresponding compound of claim 1.

7. The process of claim 6 wherein the reaction is effected at 0 to 50C with substantially equimolar amounts of the reactants in an organic solvent. 

1. A COMPOUND OF THE FORMULA
 2. A compound of claim 1 wherein R, R1, Y and Y1 are methyl and X is chlorine.
 3. A compound of claim 1 wherein X is chlorine.
 4. A compound of claim 1 wherein R and R1 are methyl.
 5. A compound of claim 4 wherein Y and Y1 are methyl.
 6. A process for the preparation of a compound of claim 1 comprising reacting a phosgene immonium salt of the formula
 7. The process of claim 6 wherein the reaction is effected at 0* to 50*C with substantially equimolar amounts of the reactants in an organic solvent. 